Air valve



AIR VALVE A T. C. DE VORE Filed April 11. 1922 JIT/72g. Z

Patented Aug. 21, 1923.

i acs-,7a

oNn-HALr .'rol BREDA c. v

Persia-fj .AIR VALVE.

Application ined April 11, 1922. `seran No; 551,488.

'ToaZZ whom. t may concern." 1

Be itv knownthat LT1-miras C. Dn Venn, a citizen ofthe United States, and aresident of the city of Chicago, countyvof Coolnand VState ofk Illinois, have invented certain new and useful Improvements in-AirValves, o'f which the followingis a specification.

' My invention relates to new vand useful improvements in air Vvalveaj-and has lfor its principal yobject thev provision `of .an iinproved construction of this character which will be highly efficient in use, one that can be readily assembled and which will be economical in manufacture.

A further contemplation of the invention is theprovision for automatically closing` the valve at a predetermined degree of heat and for automatically'opening the valve when the degree of heat decreases, In this connection, and to carry these objects into effect, I provide `tubular members carried bv a hanger and an adjustable support, formed of,

Vsuch material that iscapable of expanding and contracting when subject to'heat and such expansion and contracting being determined by the degrees of the heat. n

Other objects will appear hereinafter.

The invention consists in the combinations and arrangements ofrparts hereinafter described yand claimed.

The invention will be best understood by reference vto the accompanying drawings forming a partof this specification, and in which,

Fig. 1 is a vertical sectional detail View of an airvalve .embodying the invention, Fig. 2 is a top plan view of the same, Fig. 3 is a sectional detail view of the same taken substantiallyon line 3-3 of Fig. 1.`

Referring to the drawings showing the preferred form of construction, A represents an airvalve embodying the invention and comprisesa cylindrical body open at its lower end, said opening being closed by a f Vbasecap G having av lateral projection '7 which is adapted tol be-screw-threadcd in the openingv of a radiator, (notl shown) with which the device is associated. Theuppcr end of the. cylindrical body 5 is dome-shape, as shown, and lcarriesa valve seat 8 having a central passage 9 formed therethrough, the 4inner wall portions of said openingQ, that [is theportion extending`into the cylindrical body V5, being tapered outwardly as indicated at 10. vThe valve seat..8 is screw-threaded through an opening 10 formed the topmostor dome-shaped portion of the cylindrical bod and is provided with a flange j11 adapter to seat on an annular projection .or rib 12 extending around the walls'of the opening. v Y

The `opening 10 is Vprovided with a closure member 13 which in this instance is in 14 `formingzan integral'part of thecapand projecting Ylaterally and downwardly from the side of the cap in spaced relation with Y respect ,to the dome-shaped portion voft-he cylindrical body 5,"as shown. f V' W Arranged in the base cap 6 is a discsliaped support .15 carried by an adjustable screw 16 passing through a stuffing box 17. Y The discY 15 is arranged and adapted to support a -tubularfmember 18- having. itsside walls perforated and formed of such ma'- yand contracting when subject'lto heat, but which `inthis instanceVis formed' of such material that will withstand a greater degree of heat thanthe tubular membery 18.-:

the form of a'cylindrical cap having a vent v Thefhanger 20 in `turn supports andcarries Y a' second perforated tubular member 21 arranged within the member 18 as shown,5 and formed of the same material. AThe upper edges of the tubularmember 21 are also reenforced by achannelfshape'd ringv member 22 which carries a hanger 23 similar to the hanger 2O and formed `of the same material.

rlhe hanger 23 carries afcentral core 24 formed of such material that will not expand or contract when subject to heat and thevcore is arranged-and adapted to carry lavalve steinQlw-hich works inthe tapered portion ofthe openingj of the valve seat Aand (which is adapted to close. said-opening when; thetubularmembers 18 and 21 ex-. pand," however,.,if desired, thecore 24: can

be formed of-rn aterialsimilar tothe material from which thetub-ular members are formed.

Theyalve 'stern 24.` carries a dish-shapedannular member/Qvhich serves thepurpose 1 `of a'baflie platerfor directing the steam or water vvapor against the perforated tubular' me1nb'e`rs118 and 21.

Toprevcnt thcvalve Stem 24 from ,becoming wedged. inthe opening 9,1 provide an expansion spring 26 which embraces the valve stem and seats against the valve seat 8 and baille plate 25.

In use, my Vair vent as herein illustrated and described, is mounted in the usual way on a radiator or the like through the medium of the stein 7 and when the steam or water vapor from the radiator enters the valve, the tubular members 18 and 2l will expand according to the degree of the heat, and should the degi'ee be greater than the memberscan withstand, the said members, through expansion will cause the valve stem to close the opening 9 of the valve seat 8, thus preventing the exit of the air from the radia tor. On the other hand, when the radiator becomes air bound and the steam or water vapor cools, the tubular members will contract, thus opening the passage of the valve seat 8 permitting the air to find an exit through the passage 14. By means of the set screw 16 and disc support 15the distance between the valve stem 2% and the outer portion of the opening 9 can lbe readily adjusted and by such adjustment for example should the valve stem be adjusted any great distance from the opening, the expansion of i the tubular members 18 and 21 will doubt- Vlessly have to be greater in order to close the opening, or should the v'alve stem be adjusted nearer the opening, the expansion of the tubular members will doubtlessly be less than when thevalve stem is farther away from said opening. n

In constructing my improved air valve, I have taken into consideration that'it often becomes necessary for one who is not a me-y chanic, to adjust or repair the variousparts of the valve, and in order that such repairs can be made, I have invented a valve which comprises parts, such that ythe mounting and Varrangement of which are simple and will enable anyone not skilled in the art to take the valve apart, make such repairs as may be necessaryand reassemble 'the valve.

I have found'by experience that by forniing the vent of the cap 413 in the manner` illustrated in Fig. 1, that the singing noise which accompanies the discharge of the air from the valve is greatly obviated, if not entirely, and also by this arrangement-particles of'dust are `prevented from gaining entrance into the cap and settling around theY valve seat until the passage of air through the opening of the valve seat is prevented, this being tlie case Where-the vent of the cap is formed in alignment with the opening of the valve seat.

IVhile I have illustrated and described the preferred form of construction for carrying myriiiven-tion into effect, this is capable of variation and modification without departing fi'om the spirit of the invention, I, therefore, do not wish to be limited to the precise details of construction set forth, but.

desire to avail myself :of such variations andV modifications. as come 'within thescope of the appended claims.

Having described my invention, what IV claim as new and desire to secure by Letters Patent is:

Y 1. An air valve of tlie'class described including a casing provided with an air vent,

2. An air valve of the class described in! cluding a casing provided with an air vent, a core within the casing carrying means for controlling passage Vthrough the vent, tu

bular members'of expansible material withinthe casing, and arranged coiicentrically with respect to each other, channel shaped ring members at the upper peripheral edges of the tubular members, a support carrying the core and having'its ends resting on tlie` ring member of the adjacent tubular member, and a vsupportcarrying said tubular member'and having its ends resting on the ring member of the other tubular member.V

3. An'air vent of the class described comprising a casing having an air vent formed therein; a valve controlling said vent; an adjustable support carried by said casing; an expansible tubular member carried by said support; a hanger carried by said tu# bular member; a core of relatively small coeflicient of expansionv carried by hanger; and a valve stein carried by said last named support .for controlling said valve. Y

et. An air valve including a casing pro-y vided with an air vent and a passage in communication with the vent extending outwardly and downwardlyv with respect to the casing, a coreof relatively small coefficient of expansion within the casing and carrying' a member forclosing the. vent, tubular members having perforations formed ink the walls thereof carrying said core and adapted under iniuence of steam entering said casing to move the core to bring the vent controlling member into position to close thevent. Y

An air valve of the class described comprising a casing having an air vent formed therein; a disc-shaped support carried by said casing; a perforated tubular member of eXpansible material .carried by said support; a han-ger carried by said tubular member; another tubular member ofA expansible material Acarried by said hanger; a hanger carried by said second named tubular member; a core of non-eXpans'ible material carried by said second named4 saidk ioo iio

, red by said support; a hanger carriedV byA said tubular member; another tubular mem# ber of expansible material carried by said hanger; a valvestem earredby said core for opening and elosingsa'd valve; and means carried by said valve stem for directlng steam or the like against said tubular members.

6. Anl air valve of the class described comprising a easing having an airvent formed therein; an adjustable Vdise-shiqaed support carried by said casing; a perforated tubular member of expansible material earhanger; a hanger carriedby said second named tubular member; a core of non-expansiblernmaterial carried by said secondYV from engagement with said valve.v l Y In testlmony whereof I have signed my name to this specification 1n the two subscribingY Witnesses.

' THOMAS Vtnesses: Y

Y FREDA C. APPLEToN,

CLARENCE E. THREEDY.

o. DE vom.V

presence of 

